X-Git-Url: http://ftp.carnet.hr/carnet-debian/scm?a=blobdiff_plain;ds=sidebyside;f=src%2Fexternal%2Fpcre2-10.32%2Fsrc%2Fpcre2_jit_match.c;fp=src%2Fexternal%2Fpcre2-10.32%2Fsrc%2Fpcre2_jit_match.c;h=5a66545bae34ceb3943fc9184808205d3a10abe6;hb=3f728675941dc69d4e544d3a880a56240a6e394a;hp=0000000000000000000000000000000000000000;hpb=927951d1c1ad45ba9e7325f07d996154a91c911b;p=ossec-hids.git diff --git a/src/external/pcre2-10.32/src/pcre2_jit_match.c b/src/external/pcre2-10.32/src/pcre2_jit_match.c new file mode 100644 index 0000000..5a66545 --- /dev/null +++ b/src/external/pcre2-10.32/src/pcre2_jit_match.c @@ -0,0 +1,189 @@ +/************************************************* +* Perl-Compatible Regular Expressions * +*************************************************/ + +/* PCRE is a library of functions to support regular expressions whose syntax +and semantics are as close as possible to those of the Perl 5 language. + + Written by Philip Hazel + Original API code Copyright (c) 1997-2012 University of Cambridge + New API code Copyright (c) 2016 University of Cambridge + +----------------------------------------------------------------------------- +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + * Neither the name of the University of Cambridge nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. +----------------------------------------------------------------------------- +*/ + +#ifndef INCLUDED_FROM_PCRE2_JIT_COMPILE +#error This file must be included from pcre2_jit_compile.c. +#endif + +#ifdef SUPPORT_JIT + +static SLJIT_NOINLINE int jit_machine_stack_exec(jit_arguments *arguments, jit_function executable_func) +{ +sljit_u8 local_space[MACHINE_STACK_SIZE]; +struct sljit_stack local_stack; + +local_stack.min_start = local_space; +local_stack.start = local_space; +local_stack.end = local_space + MACHINE_STACK_SIZE; +local_stack.top = local_space + MACHINE_STACK_SIZE; +arguments->stack = &local_stack; +return executable_func(arguments); +} + +#endif + + +/************************************************* +* Do a JIT pattern match * +*************************************************/ + +/* This function runs a JIT pattern match. + +Arguments: + code points to the compiled expression + subject points to the subject string + length length of subject string (may contain binary zeros) + start_offset where to start in the subject string + options option bits + match_data points to a match_data block + mcontext points to a match context + jit_stack points to a JIT stack + +Returns: > 0 => success; value is the number of ovector pairs filled + = 0 => success, but ovector is not big enough + -1 => failed to match (PCRE_ERROR_NOMATCH) + < -1 => some kind of unexpected problem +*/ + +PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION +pcre2_jit_match(const pcre2_code *code, PCRE2_SPTR subject, PCRE2_SIZE length, + PCRE2_SIZE start_offset, uint32_t options, pcre2_match_data *match_data, + pcre2_match_context *mcontext) +{ +#ifndef SUPPORT_JIT + +(void)code; +(void)subject; +(void)length; +(void)start_offset; +(void)options; +(void)match_data; +(void)mcontext; +return PCRE2_ERROR_JIT_BADOPTION; + +#else /* SUPPORT_JIT */ + +pcre2_real_code *re = (pcre2_real_code *)code; +executable_functions *functions = (executable_functions *)re->executable_jit; +pcre2_jit_stack *jit_stack; +uint32_t oveccount = match_data->oveccount; +uint32_t max_oveccount; +union { + void *executable_func; + jit_function call_executable_func; +} convert_executable_func; +jit_arguments arguments; +int rc; +int index = 0; + +if ((options & PCRE2_PARTIAL_HARD) != 0) + index = 2; +else if ((options & PCRE2_PARTIAL_SOFT) != 0) + index = 1; + +if (functions == NULL || functions->executable_funcs[index] == NULL) + return PCRE2_ERROR_JIT_BADOPTION; + +/* Sanity checks should be handled by pcre_exec. */ +arguments.str = subject + start_offset; +arguments.begin = subject; +arguments.end = subject + length; +arguments.match_data = match_data; +arguments.startchar_ptr = subject; +arguments.mark_ptr = NULL; +arguments.options = options; + +if (mcontext != NULL) + { + arguments.callout = mcontext->callout; + arguments.callout_data = mcontext->callout_data; + arguments.offset_limit = mcontext->offset_limit; + arguments.limit_match = (mcontext->match_limit < re->limit_match)? + mcontext->match_limit : re->limit_match; + if (mcontext->jit_callback != NULL) + jit_stack = mcontext->jit_callback(mcontext->jit_callback_data); + else + jit_stack = (pcre2_jit_stack *)mcontext->jit_callback_data; + } +else + { + arguments.callout = NULL; + arguments.callout_data = NULL; + arguments.offset_limit = PCRE2_UNSET; + arguments.limit_match = (MATCH_LIMIT < re->limit_match)? + MATCH_LIMIT : re->limit_match; + jit_stack = NULL; + } + +/* JIT only need two offsets for each ovector entry. Hence + the last 1/3 of the ovector will never be touched. */ + +max_oveccount = functions->top_bracket; +if (oveccount > max_oveccount) + oveccount = max_oveccount; +arguments.oveccount = oveccount << 1; + + +convert_executable_func.executable_func = functions->executable_funcs[index]; +if (jit_stack != NULL) + { + arguments.stack = (struct sljit_stack *)(jit_stack->stack); + rc = convert_executable_func.call_executable_func(&arguments); + } +else + rc = jit_machine_stack_exec(&arguments, convert_executable_func.call_executable_func); + +if (rc > (int)oveccount) + rc = 0; +match_data->code = re; +match_data->subject = subject; +match_data->rc = rc; +match_data->startchar = arguments.startchar_ptr - subject; +match_data->leftchar = 0; +match_data->rightchar = 0; +match_data->mark = arguments.mark_ptr; +match_data->matchedby = PCRE2_MATCHEDBY_JIT; + +return match_data->rc; + +#endif /* SUPPORT_JIT */ +} + +/* End of pcre2_jit_match.c */